diff --git a/.github/workflows/renovate-config-check.yaml b/.github/workflows/renovate-config-check.yaml
index f53c12c..0ffde0b 100644
--- a/.github/workflows/renovate-config-check.yaml
+++ b/.github/workflows/renovate-config-check.yaml
@@ -12,7 +12,7 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Validate renovate.json
         run: npx --yes --package renovate -- renovate-config-validator
diff --git a/.github/workflows/test-and-release.yaml b/.github/workflows/test-and-release.yaml
index c6bf6cb..b5a3c0d 100644
--- a/.github/workflows/test-and-release.yaml
+++ b/.github/workflows/test-and-release.yaml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - uses: actions/setup-node@v6
         with: